Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/8165
Title: | Synthesis and properties of novel star-shaped polyesters based on L-lactide and castor oil | Authors: | Ristić, Ivan Marinović-Cincović, Milena Cakić, Suzana Tanasić, Ljiljana Budinski-Simendić, Jaroslava |
Issue Date: | 22-Jan-2013 | Publisher: | Springer Link | Journal: | Polymer Bulletin | Abstract: | The topology of biodegradable polyesters can be adjusted by incorporating multifunctional polyols into the polyester backbone to obtain branched polymers. The aim of this study was to prepare the biodegradable-branched polyester polyols based on L-lactide and castor oil using the trifluoromethanesulfonic acid as a catalyst. FTIR and 1H NMR spectroscopy measurements were used to estimate the molecular structure of the novel materials. The polyester polyol was synthesized by "core-first" method which involves a polymerization of L-lactide by using a castor oil as multifunctional initiator. Molar masses estimated by gel permeation chromatography and vapor pressure osmometry were in good correlation with calculated values based on hydroxyl number of obtained polymers. DSC measurements confirmed high crystallinity degree of the synthesized material. It was assessed that the molar masses of obtained polymers-influenced glass transition temperature significantly. The thermal stability was investigated by TG analysis, and the results have shown the dependence of weight loss on the arm length of the star-shaped polyesters. The thermal stability of star-shaped polyesters significantly decreased with degradation of polyester polyol obtained in acid solution. © Springer-Verlag Berlin Heidelberg 2013. | URI: | https://open.uns.ac.rs/handle/123456789/8165 | ISSN: | 01700839 | DOI: | 10.1007/s00289-013-0917-0 |
Appears in Collections: | TF Publikacije/Publications |
Show full item record
SCOPUSTM
Citations
16
checked on May 3, 2024
Page view(s)
22
Last Week
10
10
Last month
0
0
checked on May 10, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.